2個html標籤之間獲取文本C＃

Question

我試圖讓提供的HTML（跨度）之間的數據（在這種情況下，31）

這裏是原來的代碼（從檢查中鉻元素）

<span id="point_total" class="tooltip" oldtitle="Note: If the number is black, your points are actually a little bit negative. Don't worry, this just means you need to start subbing again." aria-describedby="ui-tooltip-0">31</span> 

我有豐富的文本框，其中包含頁面的源代碼，這裏是相同的代碼，但在富文本框的第51行：

<DIV id=point_display>You have<BR><SPAN id=point_total class=tooltip jQuery16207621750175125325="23" oldtitle="Note: If the number is black, your points are actually a little bit negative. Don't worry, this just means you need to start subbing again.">17</SPAN><BR>Points </DIV><IMG style="FLOAT: right" title="Gain subscribers" border=0 alt="When people subscribe to you, you lose a point" src="http://static.subxcess.com/images/page/decoration/remove-1-point.png"> </DIV> 

我該怎麼做呢？我嘗試了幾種方法，但他們都沒有爲我工作。

我正在嘗試從此頁檢索分值：http://www.subxcess.com/sub4sub.php 該數字會根據您的潛在客戶而變化。

Answer 1

你可能是令人難以置信的具體看：

var regex = new Regex(@"<span id=""point_total"" class=""tooltip"" oldtitle="".*?"" aria-describedby=""ui-tooltip-0"">(.*?)</span>"); 

var match = regex.Match(@"<span id=""point_total"" class=""tooltip"" oldtitle=""Note: If the number is black, your points are actually a little bit negative. Don't worry, this just means you need to start subbing again."" aria-describedby=""ui-tooltip-0"">31</span>"); 

var result = match.Groups[1].Value; 

Answer 2

有多種可能性。

1. Regex
2. 讓HTML解析XML和通過的所有元素獲得通過XPath
3. 迭代值。如果您使用span標籤，則跳過所有字符，直到找到結尾'>'。然後你需要的值是一切下一開幕前「<」

也期待在System.Windows.Forms.HtmlDocument

Answer 3

你要使用HtmlAgilityPack要做到這一點，這很簡單：

HtmlDocument doc = new HtmlDocument; 
doc.Load("filepath"); 

HtmlNode node = doc.DocumentNode.SelectSingleNode("//span"); //Here, you can also do something like (".//span[@id='point_total' class='tooltip' jQuery16207621750175125325='23' oldtitle='Note: If the number is black, your points are actually a little bit negative. Don't worry, this just means you need to start subbing again.']"); to select specific spans, etc... 

string value = node.InnerText; //this string will contain the value of span, i.e. <span>***value***</span> 

正則表達式，而一個可行的o ption，這是你通常想要避免的，如果在所有可能的情況下解析HTML（請參閱Here）

就可持續性而言，您需要確保您瞭解頁面源代碼（例如，刷新它並查看每次刷新後您的目標跨度是否嵌套在同一家長中，確保頁面採用相同的一般格式，等等，然後使用上述原則導航到跨度）。